You have several options for navigating the thumbnails.
Click and drag
Click and drag the thumbnail overview to the left (backward in time) or right (forward in time) inside the thumbnail overview.
The sequence slider
Drag the sequence slider, located below the thumbnail overview, to the left (backward in time) or right (forward in time).
Date and time
Click the Calendar icon 
below the thumbnail overview to access a calendar where you can specify a date and time. Click Go To to see thumbnails for the new date and time.
Tip: In the calendar, a blue background
indicates the selected date. A gray background indicates the current date.
Thumbnails with exclamation point
Depending on your navigation method, you may occasionally see placeholder thumbnails with exclamation points if there is no recorded image from a specific point in time:
These appear when the Sequence Explorer cannot retrieve a proper thumbnail, for example, because of a server communication error, a decoding error, or similar. However, placeholder thumbnails may also appear when thumbnails retrieved from the surveillance system do not exactly match requested points in time. This is because deviating thumbnails could otherwise cause confusion.
If you have selected slicing in Sequence Search, a placeholder thumbnail appears if the retrieved thumbnail is outside of the requested time interval. Example: You request a time interval of 12:00:00, 12:00:30, and the first available thumbnail is at 12:00:33. If there are no recording sequences that cover this interval, the system makes no attempt to retrieve a thumbnail and the next thumbnail displayed is from the next interval (12:00:30-12:01:00). If there are recording sequences that cover this interval, a placeholder thumbnail will appear instead.
In Sequence Search, a placeholder thumbnail appears if the retrieved thumbnail is more than three seconds off compared with the requested time, for example the time when recording of the sequence in question was triggered on the surveillance system.
You can still click a placeholder thumbnail to view video; it will take you to the first available recording after the point in time represented by the placeholder thumbnail.
© 2018 Milestone Systems A/S